I have a QSystemTrayIcon, that displays a QMenu on click, but I want to display the menu as soon as the tray icon is displayed. I have tried calling the show method on the QMenu, but the menu only seems to display when it is clicked. Any idea on how to change this behaviour?
I'm not sure if it's possible to trigger the behaviour triggered by operating system when user clicks the system tray, but at least you should be able to use QMenu::popup method to just show the menu returned by QSystemTrayIcon::contextMenu method.
Note that you should use the menu's size hint, when you calculate the menu postion relative to QSystemTrayIcon::geometry. Also you may need to use QDesktopWidget::availableGeometry to make sure the menu pops up inside the screen, no matter where the task bar is.
Related
I have a Qt form, where I have a button and menu. For various reasons I can disable certain elements, e.g button or some actions in the menu.
Is there a way I could show a tooltip or when the mouse is hovered over the disabled button or menu item with an explanation as to why it is disabled?
I am using Qt 4.8.
Thanks!
You can set the tooltip dynamically based on the state of the QWidget or by simply toggling both at the same time. Upon disabling/enabling the widget from somewhere just call QWidget::setToolTip(...) with the QString you want the tooltip to display when hovering with the mouse over the given widget. For example if you have a public slot called toggleButton(bool toggleFlag) which toggles the enable-setting of a button you can do:
void MyWidget::toggleButton(bool toggleFlag) {
this->ui->myButton->setEnabled(toggleFlag);
this->ui->myButton->setToolTip(toggleFlag ? QString("Enabled wohoo!") : QString("Disabled because I like it"));
}
You can of course do also change the tooltip by calling QWidget::isEnabled() and act upon its return value. Since you haven't given any code I can only assume how you toggle your button(s) so that's all I can give you for now.
UPDATE: It was pointed in the comments that tooltips don't work with disabled widgets due not receiving mouse events. Both statements are not true (note that I have used the same tooltip message since due to lack of minimal working example I didn't want to write a whole new project from scratch and used an existing one of mine instead):
Hovering a disabled button triggers the tooltip
Hovering an enabled button triggers the tooltip
I implemented an class, this class will show an tray icon. to handle the message from the icon, I have to create a hidden window.
Eevery thing works fine, except if You click outside of the icon, icon will not disappear. I have fixed this by adding code below:
SetForegroundWindow(message-only-hiden-window) // added
TrackPopupMenu()
RESOLUTION:To correct the first behavior, you need to make the current window the foreground window before calling TrackPopupMenu or TrackPopupMenuEx.
Now I get the expect result: the menu can disappear if you click outside of the tray icon.
The problem is now, after the call of SetForegroundWindow(message-only-hiden-window) the main app window will no responding(cannot resize move) I can see the main window actually get those messages in spy++.
Keep this the mind if no call on SetForegroundWindow(message-only-hiden-window). Fine. Except the menu will not disappear.
Anyone has experience on similar situation?
How do you implement an tray icon which has no foreground window at all?
Any kind of help will be appreciated. If you wanna the source code I can email you.
resolved. I have forgot return DefWindowProc in the message only window. tricky
I am trying to use QSystemTrayIcon for my application and i am facing some problems.
It is the first time i use qt so i am not really used to it.
I followed this tutorial to make a system tray icon but i fail to customize it.
I want to have a button show/hide and not 3 show, hide, restore. These actions are really confusing for a newbie and i dont know what to do and what to connect.
I tried some things but with no luck.
Also when the system tray menu appears if you click somewhere else, the menu stays open.
Any way to solve this thing too?
If you want to remove one of the menu items, modify the createTrayIcon function so that it only adds the actions you need (and clean up the unused members once you get it to work). It's that simple.
If you want a single menu item or button to toggle between visible and hidden, you'll need to create a custom slot that calls show() or hide() (or setVisible(bool)) depending on whether the widget is hidden or not (use isVisible() for that for example). Then connect your action to that slot.
Read the Signals and Slots documentation and examples for information about how to create a new slot.
I'm trying to design a UI in Qt and I can't find anywhere in the designer a button which can be "droped down" like combobox. What I mean by that is that I would like to have this button with his "default" option choosen so if I like it I would have to just click on it but if I would like to choose different option I would be able to clik the little arrow on the right side of this button and then pick option suitable for me at that moment.
You're looking for a QToolButton that has a set of actions or a menu set on it. From the documentation, the QToolButton::ToolButtonPopupMode...
Describes how a menu should be popped up for tool buttons that has a menu set or contains a list of actions.
Of it's values, the two that I see most frequently are DelayedPopup:
After pressing and holding the tool button down for a certain amount of time (the timeout is style dependant, see QStyle::SH_ToolButton_PopupDelay), the menu is displayed. A typical application example is the "back" button in some web browsers's tool bars. If the user clicks it, the browser simply browses back to the previous page. If the user presses and holds the button down for a while, the tool button shows a menu containing the current history list
And MenuButtonPopup:
In this mode the tool button displays a special arrow to indicate that a menu is present. The menu is displayed when the arrow part of the button is pressed.
I created a Button in MXMXL. On button click, I create a Menu as a child of the Button. I am using an XML datasource. The reason for creating it this way, was due to the amount of custom skinning involved. A popupmenubutton was not an option. Anyway, so my question is this: when clicking the button, the menu is displayed. However, if you click the button again, the menu reopens. I want the menu to close if the user clicks the button a second time. Now, I got it to work by setting a var after opening the menu, and then I check that var on each click to make sure that the menu isn't already open. If true, then it will close the menu, instead of reopening it. This works, until the user clicks away, in which the HIDE event gets dispatched and the menu closes. My hack no longer works.
Any suggestions? I spent hours trying different things. The hardest part is trying to destinguish from that second button click when the menu is open, and when the user clicks away from the menu. They both dispatch the HIDE event.
Help!!!
Have you tried adding another eventlistener to the button...FlexMouseEvent.MOUSE_DOWN_OUTSIDE ? You should then be able to set the preventDefault event to true to stop the event from firing anything else and stop the menu from closing.